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Nov. 20, 1962 H. 1-:. NOR 5 3,064,883

CALCULATING MACHINE HAVING SH LE DIFFERENTIAL MECHANISM AND PRECONDITIONED T E-OF-OPERATION CONTROL MEANS 8 Sheets-Sheet 1 Filed 001. 11. 1960 [ID M1 @1 @1 :11

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INVENTOR HERMAN ELDONZZRIS HIS ATTORNEYS Nov. 20, 1962 H. E. NORRIS 3,064,

CALCULATING MACHINE HAVING SHIFTABLE DIFFERENTIAL MECHANISM AND PRECONDITIONED TYPE-OF-OPERATION CONTROL MEANS Filed Oct. 11. 1960 8 Sheets-Sheet 2 HERMAh I EL D BN NORRIS M m1! BY H13, ATTORNEYS Nov. 20, 1962 H. E. NORRIS 3,064,883

CALCULATING MACHINE HAVING SHIFTABLE DIFFERENTIAL MECHANISM AND PRECONDITIONED TYPE-OF-OPERATION CONTROL MEANS 8 Sheets-Sheet 3 Filed Oct. 11. 1960 HIS ATTORNEYS Nov. 20, 1962 H. E. NORRIS 3,064,883

CALCULATING MACHINE HAVING SHIFTABLE DIFFERENTIAL MECHANISM AND PRECONDITIONED TYPE-OF-OPERATION CONTROL MEANS 8 Sheets-Sheet 4 Filed Oct. 11. 1960 INVENTOR HERMAN ELDON NORRIS HIS ATTORNEYS Nov. 20, 1962 CALCULATING MACHINE'HA'VING SHIFTABLE DIFFERENTIAL H E NORRIS MECHANISM AND PRECONDITIONED TYPE-OF-OPERATION CONTROL MEANS HERMAN ELYBQ JIJ IGORRIS WM 4 wflw/.

HIS ATTORNEYS 1962 H. E. NORRIS 3,064,883

CALCULATING MACHINE HAVING SHIFTABLE DIFFERENTIAL MECHANISM AND PRECONDITIONED TYPEOF-OPERATION CONTROL MEANS Filed Oct. 11. 1960 8 Sheets-Sheet 6 HIS ATTORNEYS Nov. 20, 1962 H. E. NORRIS 3,064,883

CALCULATING MACHINE HAVING SHIF'TABLE DIFFERENTIAL MECHANISM AND PRECONDITIONED TYPE OF-OPERATION CONTROL MEANS Filed Oct. 11.1960

8 Sheets-Sheet 7 INVENTOR HERMAN ELDON NORRIS z Mg Nov. 20, 1962 H. E. NORRIS 3,064,883 CALCULATING MACHINE HAVING SHIFTABLE DIFFERENTIAL MECHANISM AND PRECONDITIONED TYPE-OF-OPERATION CONTROL MEANS Filed Oct. 11. 1960 8 Sheets-Sheet 8 FIG. l5

FIG. I6

INVENTOR HERMAN ELDON NORRIS BY fl WWW HIS ATTORNEYS United States Patent Ofiice 3,064,883 Patented Nov. 20, 1962 CALCULATING MACHINE HAVING SHIFTABLE DIFFERENTIAL MECHANISM AND PRlECONDI- TIONED TYPE OF OPERATION CONTROL MEANS Herman Eldon Norris, Las Vegas, Nev., assignor to The National Cash Register Company, Dayton, Ohio, a corporation of Maryland Filed Oct. 11, 1960, Ser. No. 62,050 25 Claims. (Cl. 235-6015) This invention relates generally to calculating machines and, more particularly, to improved mechanism thereof permitting a predetermined number of multi-cycle machine operations to be performed and enabling totalizercontained amounts to be accurately read during both total and sub-total operations with item-entering digit keys retained in operated positions.

In the one particular embodiment of the present inven tion as herein illustrated and described, the calculating machine is a motorized version of the manual type of machine shown generally in the United States Letters Patent to Heber C. Peters Nos. 1,386,021 and 1,646,105, which issued, respectively, on August 2, 1921, and October 18, 1927, and in the United States Patent to Nelson White, No. 1,854,875, which issued on April 19, 1932. Reference may be had to these patents for a complete disclosure of machine mechanism which is not pertinent to the present invention and which, for that reason, will not be described or illustrated herein.

These typical machine constructions, as well as numerous other heretofore-known machines similar with regard to certain details of construction, such as, for eX- ample, that construction other than the multiple totalizer mechanism of United States Letters Patent No. 2,654,537, which issued on October 6, 1953, to Harry L. Lambert, are provided with a differential mechanism of the general type having totalizer-actuating means and printer-setting mechanism associated with and shifted selected distances in accordance with the longitudinal shifting of a plurality of stop bars. The stop bars, as set out in detail in the reference patents, are shifted first forwardly and then rearwardly, each machine cycle, to enable item amounts to be entered either additively or subtractively into the totalizer mechanism under some types of machine operations and enable accumulated amounts contained in the totalizer mechanism to be totaled or sub-totaled under other types of machine operations.

In accordance with such machine construction, and as fully set out in the above-mentioned reference patents,

a desired item amount is entered either additively or subtractively into the machine by depression of digit keys representing that amount, which keys, prior to machine cycle initiation and the ensuing forward excursion of the stop bars, present abutments in the path of movement thereof to stop the bars at selected positions for causing, at the proper time during the machine cycle, the totalizeractuating means to enter that amount into the totalizer mechanism. At the same time, a plurality of type bars are positioned for imprinting the entered item amount on a record material; that is, positioned in accordance with the shifting of the printer-setting mechanism along with the stop bars.

Also, as set out in detail in such prior patents, the total and sub-total machine operations are performed by permitting the stop bars to be shifted distances in accordance with the accumulated amount contained in the totalizer mechanism rather than distances as set by depressed or operated digit keys. With such construction, should a total or a sub-total machine operation be performed with digit keys operated for entering an item amount into the machine, the printer type bars would normally be positioned for imprinting, not the true accumulated amount contained in the totalizer mechanism, but rather an amount representing the combination of the lower digits only of the two amounts. That is, such printing mechanism type bars would be set in accordance with the stopping of some stop bars by the totalizer mechanism and the stopping of other bars by digit key abutments before they have traveled their full extent of movement as permitted by the totalizer mechanism. Thus, it is seen that, during both total and sub-total operations of machines having the general construction illustrated and described in the above-mentioned representative patents, a true reading of the accumulated amount contained in the totalizer mechanism requires the digit key abutments not to lie in the path of movement of the stop bars, since such abutments represent not the accumulated amount, but rather an individual item amount as selectively set up on the digit keys; and, in accordance with the above description, to insure a correct reading of the accumulated amount contained in the totalizer mechanism, it has been the practice, as heretofore known, to require all digits keys to be returned to their unoperated positions prior to any attempt being made for performing either a total or a sub-total machine operation. This practice, as is well known in the art, presents the problem of having to reset the digit keys to their operated positions after the completion of each sub-total or total machine operation, even though such digit keys, as previously set to their operated positions, represent an item amount which, for reasons understood from later description hereof, is desired to be entered into the machine totalizer mechanism both before and after such sub-total or total machine operation. That is, in view of such typical machine construction, requiring all digit keys to be maintained in unoperated positions during totalizer-reading machine operations, an item amount may not be retained on the machine keyboard for, with intervening totalizer-reading machine operations, repeated entry into the machine totalizer mechanism. It is this problem which the present invention is designed to overcome, so that, as understood from later description hereof, a totalizer-reading machine operation may be now performed with digit keys retained in their operated positions, in turn permitting a reusable or what may be called a common factor type of item amount to be stored or memorized on the machine keyboard throughout a plurality of item-entering and intervening totalizerreading types of machine operations. Hence, with the present invention, an item amount as initially set up on the machine digit keys, may be retained thereon and repeatedly entered into the machine totalizer mechanism, with intervening totalizer-reading operations taking place. Of course, each of such totalizer-reading operations will reflect the accumulated amount then contained in the machine totalizer mechanism, as affected by the previous item amount entered thereinto.

Thus in view of such typical machine construction requiring digit-key-actuating abutments to not interfere with the stop bar movement during total and sub-total operations, and to overcome the heretofore-customary practice of requiring all digit keys to be therefore maintained in unoperated positions during such total and sub-total operations it is the primary object of the present invention to provide new and unique mechanism enabling both the total and sub-total machine operations to be performed regardless of digit key positioning; that is, with digit keys maintained in either operated or unoperated positions.

A further important object of the invention is the provision of novel control mechanism enabling a predetermined number of multi-cycle machine operations to be performed for sequentially entering an item amount into the totalizer mechanism and then reading the accumulated amount contained therein during each machine operation.

Still another important object of the invention resides in such mechanism permitting an item amount to be memorized or continuously stored by the digit keys throughout the predetermined number of multi-cycle machine operations, such item amount being entered either additively or subtractively into the totalizer mechanism during one part of each multi-cycle operation, and such item amount being retained on the digit keys as the affected accumulated amount is totaled or sub-totaled during the remainder of each multi-cycle operation.

A still further important object of the invention resides in means providing a single printing operation to be performed each multi-cycle machine operation for recording the totalizer-contained accumulated amount as affected by the item amount previously entered therein.

A still further important object of the invention resides in means for determining the sequence of machine functions to be performed during each multi-cycle machine operation.

With these and incidental objects in view, the invention includes certain novel features of construction and combinations of parts, a preferred form or embodiment of which is hereinafter described with reference to the drawings which accompany and form a part of this specification.

Of the drawings:

FIG. 1 is 'a fragmentary view in top plan of the forward portion of a calculating machine embodying the present invention;

FIG. 2 is a view in elevation of the left side of the machine, with the cabinet removed and with particular reference to that part of the mechanism which is located on the outside of the left vertical frame plate; FIG. 3 is a view in elevation of the right side of the machine, with particular reference to that part of the mechanism located on the outside of the right vertical frame plate;

FIG. 4 is'a view in side elevation of that portion of the machine mechanism which mainly is located on the inside of the right vertical frame plate;

FIG. 5 is a top plan view, looking down upon the base of the machine, showing part of the cycle initiating means, the machine cycle control mechanism, and part of the means enabling digit amounts to be stored during machine operations;

FIG. 5A is a detail in section of the machine structure taken on line 5A5A in FIG. 5;

FIG. 5B is a detail, as seen from the right side in FIG. 5, of a guide frame permitting the differential stop bars to be shifted from item-entering positions to totalizerreading positions;

FIG. 6, on the sheet containing FIG. 4, is a detail of a representative stop bar as positioned in alignment with digit key abutments during item-entering machine cycles,

and as shifted away therefrom during totalizer-reading cycles; 7

FIG. 7 is a right side elevational view of the printer mechanism and paper carriage, partly in section, and

with particular reference to type hammer and paper-shift- 1ng mechanism adjacent the center portion of the machine;

FIG. 7A is a detail of mechanism, as included in FIG.

7, for disabling the type hammers during item-entering cycles of the machine;

7 FIG. 7B is a view in top plan of that mechanism shown in FIG. 7A;

' FIG. 8 is a view in rear elevation of paper spacing control mechanism, as included in FIG. 7; p

FIG. 9 is a schematic representation of one line of elements incorporated in the machine cycle control mechanism, being illustrated at home position as seen from the right of the machine, and including a drive pawl as also illustrated in its home or rest position; 1

'FIG. 10 is a view of the drive pawl shown in FIG. 9,

as shifted to a neutral or unoperating position;

differential mechanism thereof;

'FIG. 15 is a fragmentary portion of a typical printed record which may be prepared by the machine; and

FIG. 16 is a fragmentary portion of a further printed record which may be prepared by the machine.

General Description As above mentioned, the typical calculating machine embodying the present invention, and as herein illustrated and described, is of the general type disclosed in United States Letters Patent Nos. 1,386,021; 1,646,105; 1,854,875; and, in part, 2,654,537. Referring to FIG. 1 herein, the mechanism of the machine is enclosed in a suitable cabinet or case 20 secured to a base member which supports the framework of the machine. The ma--- chine is provided with a totalizer mechanism and m y have, as seen in FIG. 1, associated indicatdrwheels, 21; which are visible thioug h a viewing aperture 22 provided in the case 20. As seen in FIG. 7, a paper carriage 23, extending across the rear of the machine in the usual manner and as set out in detail in the Heber C. Peters United States Patent No. 1,386,021, presents a platen 24, around which a listing tape (not shown herein) may be wound for receiving printed impressions of item amounts and other digits entered into the mat-Shiner Referring further to FIG. 1, the machine is provided with a plurality of rows of digit keys 25, each row containing nine keys to represent the digits 1 to 9, inclusive; a cyclically-operable machine drive mechanism (FIG. 2), providing cycles of operation for item entry and accumulated amount reading or withdrawal; an add motor bar or control key 26 for initiating a cycle of operation in which an item amount set up on the digit keys 25 is entered additively into the totalizer mechanism of the machine; a correction key 27 for returning depressed digit keys 25 to an unoperated condition before the initiation of a machine cycle; and a total lever 28 (FIGS. 3 and 4),- the forward shifting of which initiates a machine operating in which the amount accumulated in the totalizer mechanism is printed on the listing tape, while the rearward shifting of said lever 28 initiates a machine opera tion in which the accumulated amount is cleared from the totalizer mechanism along with being printed on the listing tape. Although not specifically illustrated or described herein along with the representative embodiment of the present invention, but in accordance with the disclosures contained in the reference patents, a subtract mechanism of the general type as best shown in the Nelson White United States patent, No. 1,854,875, may be included for initiating a cycle of operation in which the item amount set upon the digit keys 25 is'entered subtractively into the totalizer mechanism of the machine. Such mechanism, along with the mechanism associated with the add control key 26, permits item amounts set up on the digit keys 25 to be selectively entered either additively or subtractively into the machine totalizer mechanism.

In this regard, reference is also made to United States Letters Patent No. 2,665,063, issued to Nelson R. Frie; berg and Oscar F. Larsen on January 5, 1954, which dis-. closes a calculating machine of the general type which may also be included within the embodiment and scope of the present invention. Such a machine is similar in construct1on to those disclosed in the above-mentioned,

Peters, White, and Lambert United States patents, having a differential mechanism of the same general type, having a slightly modified totalizer mechanism, and having individual total and sub-total control keys substituted for the single total lever 28 illustrated and described herein. A motor bar or add control key is included in such machine construction, being substantially the same as the control key 26 hereof, and, in view of the above-mentioned modified totalizer mechanism, as disclosed in the Frieberg and Larsen patent, a subtract mechanism of substantially different construction replaces that included in the illustration and description contained in the United States patent to Nelson White, No. 1,854,875.

Added to the basic machine employed in the present invention is a manually-settable machine operation control knob 29, shown in FIG. 1 as located adjacent the front end portion of the left side of the machine cabinet 21). Such control knob 29, through mechanism associated therewith as described later in. the specification, provides means for selectively conditioning the machine to perform a predetermined number of multiple-cycle operations. That is, upon the turning of the knob 29 from a designated starting position, such as 0, to any desired digit position as inscribed thereon, mechanism associated therewith is set, and, after later machine cycling through cycleinitiating means, as will be shortly described, continuous multiple-cycle machine operations are performed, one after another, until the control knob 29 is automatically indexed back to its position, at which time the cyclically-operable machine drive mechanism is permitted to come to rest. A pointer member 30, fixedly carried by the machine casing 20, cooperates with the control knob 29 for indicating at all times the number of continuous machine operations to be performed.

A continuous cycle control lever 31 is included in the machine construction as the means for initiating multiplecycle machine operations in accordance With the setting of the knob 29. This lever 31, shown located in FIG. 1 to the left of the digit keys 25, when shifted rearwardly within a slot 32 in the machine case 20, becomes latched and causes the machine drive mechanism to be tripped for continuous cycling as long as the control knob 29 is away from its 0 position. Then, as the knob 29 returns to O, as above set out, the lever 31 is released from its latched condition and permitted to shift forwardly within the slot 32, thereby releasing the machine drive mechanism from its continuously-tripped condition and permitting it to coast to its home or rest position, as seen in FIG. 2.

Referring further to FIG. 1, an additional control key 33 is included in the machine construction, being located a spaced distance forwardly of the lever 31, and providing means for selectively interrupting multiple-cycle machine operations initiated by the rearward shifting of the lever 31. Thus, with the provision of such a control key, hereinafter referred to as the stop control key 33, the predetermined number of continuous machine operations, as set up on the control knob 29, and as initiated by the lever 31, may be stopped at any time if so desired by the machine operator. Although the specific structure and precise mode of operation will be set out in detail later herein in reference to FIG. 2, it is sufficient to say at this time that such stop control key 33-, when. operated, also unlatches the lever 31 and permits the drive mechanism to thereby come to rest. Any remaining machine operations as set up on the control knob 29 may, of course, be resumed and completely by the mere shifting of the lever 31 again to its rearward, cycle-initiating position.

As will be later set out in detail in relation to FIGS. 4, 5, and 6, and as above included in the objects of the present invention, structure is provided in the machine construction enabling both total and sub-total machine operations to be performed with digit keys 25 retained in depressed conditions. Such structure, along with that permitting a predetermined number of multi-cycle machine operations to be performed, provides an overall calculating machine extremely flexible in operation and with a wide range of available functions.

From the above general discussion of the invention, it is seen that one desired embodiment thereof provides for a calculating machine of the general type having machine drive means, totalizer mechanism, differential mechanism for entering digit amounts into and affecting accumulated amounts contained within the totalizer mechanism, means associated with and selectively setting the differential mechanism in accordance with a digit amount to be entered into the totalizer mechanism, machine multicycle initiation and control mechanism, and mechanism dissociating the differential mechanism from the setting means in order that accumulated amounts contained in the totalizer mechanism may be afiected without disturbing the digit amount setting means.

Although reference may be had to the above representative patents disclosing a calculating machine having the general construction embodied herein, enough of the pertinent mechanism thereof will be described in the following detailed description to give a thorough understanding of the instant invention.

Machine Drive and Cycle Initiating Mechanism Referring to FIGS. 2 and 12, the calculating machine is driven by an electric motor 34 upon the closing of a switch 35, which connects the motor to a source of electric current (FIG. 13). The switch 35 is closed by a roller 37 on a lever 36, said lever 36 being rotatably mounted on a shaft 39 journaled in the machine left vertical frame plate 40, as seen in FIG. 2. Secured to the shaft 39, on the inside of the frame plate 40, is a multiplearmed lever 41, while on the outer side of the plate 40 there is secured to the shaft 39 a three-armed cycle control lever 45. These levers 41 and 45 are constantly urged clockwise by a spring 46, shown in both FIGS. 2 and 12, but are normally restrained from so moving by a trip latch 49. As seen in FIG. 12, this trip latch 49 is pivotally mounted on a stud 50, which extends from a bracket (not shown herein) secured to the frame plate 40. If the trip latch 49 is swung clockwise about its pivot stud 511, as seen in FIG. 12, by means to be described later herein, a distance sufiicient to remove it from under a latch ear 42 of the lever 41, the shaft 39 and both levers 41 and 45 will likewise be turned clockwise under the force of the spring 46. During such clockwise movement, a stud 4-3, mounted on a lower extending arm of the lever 41, will strike the lower end portion of the lever 36 to turn it clockwise also, thus causing the roller 37 thereon to contact and close the switch 35, which completes the electric circuit (FIG. 13) for starting the motor 34.

As will be described shortly, the operation of the motor 34 causes a rear drive shaft 51 to oscillate first counterclockwise and then clockwise back to its home position (FIG. 12) and in the reverse directions as seen in FIG. 2. A cam lever 52, secured to the drive shaft 51, normally holds a detent 53 away from an car 38 turned from the upper end of the lever 36, toward which it is urged by a spring 54, but, as the cam lever 52 turns counter-clockwise upon the rocking of the drive shaft 51 (FIG. 12), a lower shoulder 55 of the detent 53 will fall behind the ear 3% as the lever 36 is moved clockwise, holding the switch 35 in a closed condition. Then the cam lever 52, on return movement at the end of the cycle, will strike a rearward end 56 of the detent 53, thereby lifting the detent 53 upwardly away from the ear 38 to again open the swtich 35 at the end of the machine cycle.

The motor 34-, through reduction gearing not shown herein, drives a horizontal shaft 58 counter-clockwise (FIG. 2). Secured to the shaft 58, behind a plate 59, is a notched gear or wheel 60, which is adapted to be engaged by the end of a pawl 61, such pawl 61 being pivoted to a drive or crank plate 62, which is rotatably ,mentioned United States patents 78 constantly rearwardly.

mounted on the shaft 58. The pawl 61 is normally urged counter-clockwise into engaging position with the notched Wheel 60 by a spring 63, but, when the cycle control lever is in home position, a stud 47 thereon bears against an upper end portion of the pawl 61, as seen in 2,- to hold it from such engagement with the wheel 60. Then, as above mentioned with reference to FIG. 12, if the trip latch 49 is rocked clockwise,- permitting the levers 41 and 45 to be also rocked clockwise, the stud 47 on the lever 45 will be moved away from the pawl 61 and allow the pawl to engage the notched wheel 68 on the shaft 58. Thus, it is evident that, as the motor 34 is started, the pawl 61 is engaged with the wheel on the sliaft 58,- and, due to its being mounted on the crank plate 62, the crank plate 62 commences to move counter-clockwise, as seen in FIG. 2. A drive link 64 is pivoted by one end to the crank plate 62 by means of a titu'tl 65thereon. The other end of the link 64 is pivoted to a bell crank lever 66, which is rotatably mounted on the rear drive shaft 51. Also pivoted to the drive link 64,'by means of a stud 67, is a lever 68 having a roller stud 69 mounted near its outer end, which stud 69 cooperates with a notch in a drive plate 70 secured to the shaft 51. The stud 69 is normally urged into engagement with the notch by a spring 71 extending between the outer end of the lever 68 and a downwardlyextending arm of the bell crank lever 66. This spring 71 is strong enough to hold the stud 69 in the notch to form a driving conneetionbetween the bell crank lever 66 and the shaft 51 during all normal operations of the machine, but such connection will yield to any overload placed on the machine.

As the crank plate 62 nears the end of its rotation, a cam portion 72 thereof strikes a roller 48 carried by the downwardly and forwardly extending arm of the cycle control lever 45, rocking said lever 45 clockwise as seen in FIG. 2 and counter-clockwise as seen in FIG. 12. Referring further to FIG. 12, as the lever 45 is rocked counter-clockwise, it carries the lever 41 with it,

thus allowing the trip latch 49 to swing under its ear 42 and hold it in home position. In this position, the motor switch 35 is open, since the cam lever 52 shifts the detent 53 from holding engagement with the lever 36, thereby permitting the leaf 35a of the switch 35 to rock the lever 36 counter-clockwise and under the detent 53. The trip latch 49 is moved to machine-tripping position by an outer free end portion 76 of a trip lever pivoted, adjacent its other end, by a stud 77 to a rear base plate 73 of the machine (FIG. 5). The actual tripping of a calculating machine embodying the present invention may be effected by various means; that is, the swinging of the trip latch 49 from under the car 42 of the three-armed lever 41 as above described. Looking particularly to FIGS. 3 and 5, and referring to the above to Lambert, No. 2,654,537, and Frieberg and Larsen, No. 2,665,063, it is seen that the machine may be effectively tripped upon the depression of the illustrated add motor bar or control key 26, or the subtract control key or lever if provided in the machine construction, through the following mechamsm.

Referring to FIG. 5, the trip lever 75 is coupled to the add control key 26 by a link 78, interconnected to the lever 75 by a pivot stud 79 and extending therefrom toward the front of the machine. As seen in FIG. 3, the forward end of the link 78 is pivoted to the lower extending arm of the machine main trip lever 82, pivoted to the machine right vertical frame plate 80 by a pivot stud 83. The forwardly extending arm of the main trip lever 82 has an ear 84, which is yieldingly held against the right frame plate 80 by aspring 85, thus urging the link In this position, under the tension of such spring 85, the lever 75 is in a non-tripping position and maintains the trip latch 49 under the ear 42 of the lever 41 (FIG, 12). In the manner set out key, such as the add motor ba'r 26 illustrated in this particular embodiment of the invention, the machine main trip lever 82 is rocked clockwise (FIG. 3) about the pivot 83 to overcome the tension of the spring 85, pulling the link 78 forwardly and rocking the trip lever 75 counter-- clockwise. Upon such counter-clockwise rocking of the lever 75, the trip latch 49, which is normally urged in. a latched position under tension of the spring 85, is swung to an unlatching position and permits the motor-activating switch 35 to be closed in the usual manner, as set out above in relation to FIG. 12. Then, after the machine cycles and the cam lever 52 removes the detent 53 from engagement with the lever 36, the trip latch 49 is again urged to latching position through a reverse rocking of the lever 75 under tension of the spring 85. In addition to such manual tripping of the machine under depression of the usual control keys provided thereon, the latch 49 may also be swung to a tripping position by means of electrically-controlled mechanism now to be described.

Referring further to FIG. 2, a link 86 is pivotally con-- nected by one end to a downwardly-extending arm of the lever 45 by means of a stud 87, which also anchors, as

'45 is maintained in its unrocked positionthat is, in the position shown in FIG. 2when the machine drive mechanism is at home, the lever 89, through its finger member 99, maintains a current supply line switch 92 in a closed condition, such switch becoming open as the machine drive mechanism leaves home position and then again closing at the end of each cycle. As shown in FIG. 2, the switch 92 extends downwardly from a bracket 93, which is secured to the left vertical frame plate 40 at a zone above the lever 89.

A second switch 94, extending upwardly from the bracket 93, is normally open but may be closed by shifting an actuating roller 96 thereagainst. This roller 96,

as seen in FIG. 2, is carried on the outer end of an arm 95, which, by means of a stud 97, is pivoted to and extends rearwardly from the above-mentioned continuous cycle control lever 31. Such lever 31, as seen in FIG. 2, is rockably carried on a frame-carried bolt 100, being normally urged clockwise thereabout 'by means of a spring 101 extending therefrom to a forwardly-positioned stud 102. Thus, as the lever 31 is manually shifted rearwardly within the slot 32 (FIG. 1)-that is, rocked counter-clockwise about the bolt 1%, as seen in FIG. 2 the switch 94 is closed by the roller 96 being shifted thereagainst as the arm is moved rearwardly, and,

75 counter-clockwise about its pivot stud 77 to swing the trip latch 49 from under the ear 42 of the lever 41 (FIG, 12). Upon this happening, the motor switch 35 is then closed by the roller 37 as above described, thus starting the motor 34 in operation. As illustrated in FIG. 5, the trip solenoid 103 is secured to the rear base plate 73 of the machine, having the outer end of its core member 104 pivoted to the trip lever 75 at a zone approxi- 9 mately central of the outer free end 76 and the link stud 79 thereof.

As seen in FIG. 13, wherein the circuitry illustrated is that as effected when the calculating machine is at home, or rest, position, an additional switch 103a is included in the tripsolenoid-energizing circuit, being associated with machine cycle control mechanism which will be described in detail later in this specification. At this time, it is sufficient to say that such switch 1%311 is maintained in a closed condition by such mechanism when the calculating machine is at home position; that is, not in the process of performing a multiple-cycle operation as later de scribed. 7

From the above description, and in view of the circuitry illustrated in FIG. 13, it is seen that the calculating machine embodying the present invention may be cycled for operation in several ways. In the one instance, the motor bar 26 may be depressed for manually rocking the trip lever 75 as above described. In the other instance, the lever 31 may be shifted rearwardly Within the slot 32 (FIG. 1) for closing the switch 94 and completing a circuit to the trip solenoid 103, which, as above described, also rocks the trip lever 75. In each instance, the rocking of the trip lever 75 causes the trip latch 49 to be removed from under the car 42 of the lever 41, thereby permitting the motor switch to be closed for starting the motor 34 in operation and oscillating the rear drive shaft 51 as above described. Referring especially to FIGS. 2 and 13, although the switch 94 may be maintained in a closed condition, either by manually holding the lever 31 in its rearwardly-shifted position or through automatic latching means as will be later described in relation to the multiple-cycle control mechanism, the energizing circuit is removed from the trip solenoid 103 upon the closing of the switch 35, since, simultaneously therewith, the switch 92 becomes opened as the machine drive mechanism moves from its home position,

As above mentioned, the drive shaft 51, which extends transversely between the machine frame plates and 89, oscillates first counter-clockwise and then clockwise (FIGS. 3 and 4) during each machine cycle. Referring especially to FIG. 3, adjacent the frame plate 80, the rear drive shaft 51 has secured thereto a plate-like member 135, connected by a link 1% to the usual full-stroke sector 1M secured to a main shaft 108. The main shaft 108 also is mounted in the frame plates 49 and St for oscillating movement therein at a zone forward of the rear drive shaft 51.

The plate-like member 165 (FIG. 3) has, in its forward edge, a depression into which a roller 109 is urged by a spring 111. The roller 109 is carried by a bell crank 110, which is pivotally mouted on the frame plate 80. The notch or depression is so located in the member 105 that it will be positioned opposite the roller 1%? when the member is in its normal, home, position, there- 'by cooperating with the roller 1419 in assisting parts of the machine to be restored to their normal, home, positions.

Mac/zine Keyboard The machine is provided with a suitable keyboard in which the digit keys 25 for controlling the movement of the differential mechanism are mounted. The keyboard is of the well-known type upon which digit amounts may be set up to control the entries of amounts into the machine, being fully shown and described in United States Letters Patent to Charles Schroder No. 2,062,731, which issued December 1, 1936, and to which patent reference may be had for the specific details of its construction.

For an understanding of the instant invention, it is only necessary to explain that the keyboard is made up of the plurality of rows of digit keys 25, one row of which is shown in FIG. 4, which keys are normally out of controlling relation with the differential mechanism and which, when they are selectively depressed to set up amounts to be entered into the machine, are moved into position to control the extents of movement of the differential mechanism according to these amounts. In general, the keyboard construction includes a top plate 115, a bottom plate 116, a left side plate 117 (FIG. 2), and a right side plate 118 (FIGS. 3 and 4). The digit keys 25 are provided with key stems 25a, slidably mounted in aligned sots cut in the top and bottom keyboard plates, being normally yieldingly held up in ineffective positions by means of springs (not shown herein) and projecting below the bottom plate 116 as digit keys 25 are depressed for entering item amounts into the machine. As will be described later in detail, such projecting key stems 25a control the movement of the differential mechanism and its associated printing mechanism.

As also set out in detail in the Schroder United States Patent No. 2,062,731, the usual zero stop bail and latching bail are included in the keyboard construction, the latter of which bails latches any depressed digit key 25 in operated condition until it is released, prior to a machine cycle, by depression of another digit key in that row or by the clockwise rocking of a key release bail 120 (FIGS. 3 and 4). Although several means are normally provided in machine constructions for so rocking the key release bail 120, including the usual by-pass pawl of the Schroder United States patent, which causes all digit keys to be released near the end of each machine cycle, the sole means incorporated herein for rocking the bail 12'0 is the above-mentioned manually-operable clear or correction key 27. As fully disclosed in the Heber C. Peters United States Patent No. 1,386,021, such key 27, when depressed, engages a stud 121 of the bail 120, thereby rocking the bail 120 and releasing the keys in the usual manner. This single means for actuating the key release bail 120 seems self-evident when considering the overall scope of the present invention, wherein, as above described, each digit amount is desirably maintained or stored on the machine keyboard throughout a plurality of multiple-cycle operations.

Difierential Mechanism The differential mechanism used in the present invention is substantially like that fully shown and described in the United States Patent to Nelson White No. 1,854,875 and will, therefore, be but briefly described herein. In such construction, a differentially-operable means is pro vided for each denominational row of digit keys 25, and, since all of these means are substantially alike, it is believed that an understanding of the construction and operation thereof will be clear from the following description of a typical one of them only.

As shown in FIGS. 4 and 6, a stop bar 122 is located immediately below each row of keys 25. This stop bar 122 is pivotally connected at its rear end by a stud 123 to a diverging lever 126 and is supported by a slotted plate or comb 128 at its forward end so as to be suitably guided for sliding movement. A spring 124, which is connected between a stop bar stud 125 and a forward cross-shaft 129, normally urges the stop bar 122 forwardly of the machine; that is, to the left as seen in FIG. 4. When the machine operates, the stop bar 122 will be allowed to be moved to the left or forwardly of the machine by the spring 124 until one of the abutments on the upper edge of the bar engages the lower end of the stem 25a of a depressed key 25 to limit the movement of the stop bar 122 to an extent which corresponds to the value of the depressed key.

The diverging lever 126 is pivotally mounted on a diverging lever shaft 127 and has a rearward extension to which is connected an amount printing type bar 130. As the stop bar 122 moves forwardly of the machine, the diverging lever 126 will move therewith, being rocked counter-clockwise (FIG. 4) about the shaft 127 a distance proportional to the value of the depressed key, and will position the type bar 130 accordingly to place in v -Patent No. substantially the same as the original diverging lever of key 25, the rack lever 351 of the diverging lever 126 131 extends across the machine and, as shown fully in position and guide each stop bar fixedly extending between and 80, and, by means of a 133' coacting with a like number of framecarried studs 134, said comb 128' is enabled to be shifted 11 printing position the type corresponding to the depressed key.

As further set out in the Nelson White United States .Patent No. 1,854,875, a rack lever 351 is also pivotally mounted on the shaft 127 (FIG. 4), immediately adjacent the diverging lever 126 (FIG. 6). As illustrated (FIGS. -4 and 6), the construction of these diverging and rack Ilevers 126 and 351 is somewhat different from that em- ;ployed in the White machine, in that both the gooseneck arm and the extension thereof are herein eliminated. The rack lever 351, as further illustrated in FIG. 14, carries at its upper end a totalizer-actuating rack 352 associated with the usual totalizer mechanism, which is also described only briefly herein in view of the prior disclosure thereof in boththe Peters Patent No. 1,386,021 and the White Patent No. 1,854,875. By means of an intervening hub 350 (FIGS. 4, 6, and 14), the rack lever 351 is permanently joined to the diverging lever 126 and moves therewith to effect the totalizer mechanism in accordance with the movement of the stop bar 122 as above described. This interconnecting of the rack lever 351 with the diverging lever 126, as specifically set out in the White 1,854,875, results in an overall diverging lever the standard Peters adding machine, being a unitary member, as disclosed in the Peters Patent No. 1,386,021. With such construction, when the diverging lever 126 rocks counter-clockwise (FIG. 4) about the shaft 127 as the stop bar 122 moves forward to contact a depressed and its associated rack 352, which are joined thereto (FIG. 14), will be given a similar movement.

The diverging lever 126, its rack lever 351, and the stop in their home positions, shown in permanently interconnected bar 122 are normally held FIG. 4, by means of the usual bail 131, which engages the upper front edge (see also FIG. 14). The bail said White patent, is supported at its ends by the usual pair of arms, which are operated to move the bail forward an amount sufficient to allow the maximum extent of setting movement of the diverging lever 126 during the first half of a machine cycle, and which return the bail and the lever 126 to the position shown in FIG. 4 during the last half of a machine cycle, as is well known in this type of machine.

In the operation of the differentially-operable means, therefore, the diverging lever, the rack lever, and the stop bar will move with the bail 131 until one of the abutments on the stop bar 122 engages the lower end of a key stem 25a to prevent its further movement, after which the bail 131 leaves the upper front edge of the lever 126 and continues its movement. In its return movement, the bail 131 picksup the diverging lever 126 and the rack lever 351 from their set positions and carries them and the stop bar 122 with it back to their normal positions, as shown in FIG. 4.

As above described, he stop bar guide plate or comb 128 extends across the forward end of the machine to 122 in'relation to its associated row of digit keys 25. Looking at FIGS. 5, 5A, and 5B, such comb 128 is carried by a rearwardlyand upwardly-directed leg of a supporting frame 132 the machine frame plates plurality of comb-carried guide slots leftwardly, as seen in FIG. 5, a set distance along its supporting frame 132. An overturned flange 135 is provided adjacent each end of the frame 132, extending over the upper edge portion of the comb 128 for maintaining a close relationship between the fixed frame and the shiftable comb.

Although the precise means for shifting the comb 128 along its frame 132 will be described later in the specification, in more or less detail, particularly in reference to the machine multi-cycle control mechanism, it is sufficient to say at this time thatsuch control mechanism, through a cam member, an arm, and a link, periodically shifts the comb 128 from its solid-line position of FIG. 5 to its dashline position thereof, and then returns it back to its start ing position during designated machine cycles. As best seen in FIG. 5, this aim, herein designated as control afni 136, is pivotally mounted on a base-carried bracket 139 by means of a bolt 1.46. A rearwardly-posi'tioned roller stud 137 thereof operably engages said cam member, while a forwardly-positioned stud 138 thereof pivotally connects one end of the above link, herein designated as control link 141, which in turn pivotally interconnects at 142 the lower right end portion of the comb (FIG. 5B). With such construction, as the machine multi-cycle control mechanism cam member is rotated during machine cycles of operation as later described in the specification, the stop bar guide plate or comb 128 is effectively shifted first leftwardly by the cam member and then returned thereby to its starting position; that is, to the solid-line position of FIG. 5

Referring further to FIG. 5, it is apparent that, as the comb 128 is so shifted back and forth along the supporting frame 132, the plurality of stop bars 122 guided there by, one for each row of digit keys 25, must likewise be shifted therewith. As seen in FIG. 6, where a typical stop bar 122 is illustrated in relation to its diverging lever 126 and guiding comb 128, such shifting of each stop bar is permitted in view of the normally loose pivotal interconnection between its rear end and the associated diverging lever; that is, such stop bar rear end being loosely mounted on the diverging lever stud 123. Therefore, in accordance with such construction, as the comb 128 is actuated from its home position, which is the solid line position of FIGS. 5 and 6, to its shifted, or dash-line posiiton thereof, the forward end of each stop bar 122 is shifted a like distance, which, as seen in FIG. 6, is suf ficient to remove its upstanding abutments from under the associated row of digit keys 25. Then, upon the return shifting of the comb 128 to its home position, each stop bar 122 is again shifted back to he immediately below its row of digit keys 25. Although the extent of forward movement of each stop bar 122 is'controlled by an operated digit key 25 located thereabove when in its home position, each stop bar 122 is not affected by that depressed or operated digit key 25 when in its shifted position and may, therefore, travel an extent wholly independent .of a digit key 25 which may be retained in its operated As mentioned above, the totaliZer mechanism of the instant invention is substantially like that illustrated and described in the Peters and White patents, to which reference may be had for a most complete understanding of its construction and mode of operation.

Essentially, the totalizer mechanism is carried across the upper portion of the machine, having its previouslymentioned indicator wheels 21 (FIG. 1) rotatably carried by a shaft-like rod 353, which rod, as seen in FIG. 14, is part of a number wheel frame 354, and which frame, as further seen in FIG. 4, is carried by a rock shaft 355 extending between the machine frame plates 40 and 80. In the usual manner, as set out in detail in the Peters Patent No. 1,386,021, the number wheel frame 354 is made up of a plurality of interconnected partition and end plates, and, through the selected rock- "secured to a related one of the indicator wheels 21. Associated with such rack 352 and pinion 356 are the customary transfer and control mechanisms, being supported in the usual manner on shaft-like rods 143 and 144, extending between the machine frame plates 41 and. St (FIGS. 2, 4, and 14). 1

With such overall construction, which, in view of the Peters and White reference patents, is well known to those skilled in the art, it is understood that either clockwise or counter-clockwise rotation may be imparted to the totalizer pinions 556 through each rocking of the diverging levers 121 and their interconnected rack levers 351, depending upon both the point of time at which and the length of time for which such pinions 356 are caused to mesh with the actuating rack 352, as controlled by upward and downward rocking of the number wheel frame 354 during machine cycling. Thus, through rocking of the number wheel frame 354, as directed by both digit-entering and reading operations of the instant machine, the totalizer mechanism is actuated by the abovementioned rack levers 351 associated with the diverging levers, receiving item amounts therein when the stop bars 122 are set in accordance with operated digit keys 25 and giving accumulated amounts therefrom when such stop bars 122 are set in accordance with the totalizer mechanism itself, the latter of which requires all digit keys 25 to be in ineffective positions in relation to the stop bars 122.

Printing Mechanism and Record-Feeding Means Printing is performed in the instant machine by the well-known printer as illustrated in the above-mentioned United States reference patent to Harry L. Lambert, No. 2,654,537, and as set out in detail in United States Letters Patent to Nelson R. Frieberg and Oscar -F. Larsen, No. 2,813,611, which issued on November 19, 1557.

As above mentioned in reference to the differential mechanism, a rearwardly-extending portion of the diverging lever 126 is pivoted to the type bar 13b. As seen in FIG. 7, this type bar 1311 is movable vertically in slotted guides 148 and 149 with respect to the paper platen 24, and in accordance with the selected positioning of the diverging lever 126 under control of the associated stop bar 122. The type bar 130 has, at its top portion, a plurality of individual type members 15% When a particular type member 150 is moved to a printing position, it is hit by a printing hammer 151 when released from a cocked position, at printing time, by the tripping of a latch 152.

Referring to FIG. 7, when the type bar 131 is selectively raised to printing position as above described, a stud 147 thereon enables an interponent 153 to rock counter-clockwise on a bail 154 under urge of a spring 155. The bail 154 is secured between an arm 156 and another arm, like the arm 156, secured on a shaft 157, which extends between the printer vertical side plates 145 and 146 (FIG. 7B). A cam lever 158, secured on the rear drive shaft 51, is also rocked first counter-clockwise and then clockwise during each machine cycle. With such counterclockwise rocking of the cam lever 158, a stud 159 thereon strikes the tail 161] of the arm 156, shifting the bail 154 and the rocked interponent 153 toward a lower step of the hammer latch 152, which thereby is moved to unlatching position near mid-cycle of a machine operation. As seen in FIG. 7, such actuation of the hammer latch 152 is permitted if, and only if, the type bar 130 has been moved from home by its diverging lever 126, so as to shift its stud 147 and render the interponent 153 effective for causing the printing hammer 151 to hit the type member 1511 which is positioned at the printing station. Should the type bar 139 not be moved from its home position by the diverging lever 126, it is clear that the interponent 153 will not be permitted to rock counter-clockwise for actuating the hammer latch 152 when shifted, as above described, by the cam lever stud 159.

Referring further to FIG. 7, along with FIGS. 7A and 713, additional structure is included in the printer mecha nism for normally disabling a printing operation even though the type bar 130 is moved from home by the diverging lever 126 and the interponent 153 is thereby permitted to rock, as above described, toward the lower step of the hammer latch 152. This included structure, as will now be described, effectively controls the extent of rocking of the interponent 153 after it has been released for rocking by the shifting of the type bar 151 That is, when once released for rocking, the interponent 153 may still be allowed a limited rocking only, insufiicient to engage the lower step of the hammer latch 152 and thereby not rocking such latch 152 as the interponent is shifted during a machine cycle.

As best seen in FIGS. 7 and 7A, a print bail 161 is rockably carried by a shaft 165 extending between the machine frame plates 40 and 30, such bail 161 being normally urged counter-clockwise by means of a spring 164. A left arm member 162 is turned rearwardly therefrom to slidingly engage, by means of a bifurcated end por tion, a stud 167 carried on the upper end of a bell crank 166 rockably mounted on a second shaft 169. As seen in FIGS. 2 and 3, this shaft 169 extends between the frame plates 40 and 80. A second arm member 163 (FIG. 4), turned rearwardly and somewhat downwardly from the right end of the bail 161, will be described later herein in relation to bail-actuating means associated with the multi-cycle control mechanism of the machine. To provide a more thorough understanding of the approximate location of members now being described, it may be stated that the bail right arm member 163 lies near the machine right frame plate 81%, whereas the bail left arm member 162 and its associated bell crank 166 are located adjacent the outer side of the printer left vertical side plate (FIG. 73).

Referring further to FIG. 7A, a link 170, by means of a bell crank stud 168, is pivotally interconnected by one end to the bell crank 166. The link 17% extends downwardly therefrom to likewise pivotally interconnect, through a stud 171, the forward end of a print control arm 172, which is rockably mounted on the left end of a printer shaft 175, also located on the outer side of the printer left vertical side plate 145. A second bail member, herein referred to as a print control bail 176, is rockably mounted on a second printer shaft 1% and is so positioned thereon, between the printer side plates 145 and 146, to extend immediately below the forward end portion of each interponent 153. By means of an outwardly-directed stud 178, carried by an upwardlyand rearwardly-turned arm portion 177 of the bail 176, such bail is operably interconnected with the print control arm 172 and its associated link 176, bell crank 166, and bail 161. Although not specifically illustrated herein, the stud 178 extends freely through an opening in the printer left vertical side plate 145 to slidingly engage, as shown in FIG. 7A, a slot 173 in the rear end portion of the print control arm 172. A spring 179, stretched between a control arm stud 174 and a side frame stud (not shown herein), normally urges the print control arm 172 counterclockwise, and, in view of the above-described stud 178 and slot 173 interconnection, the print-blocking bail 176 is thereby, likewise, normally urged in the same direction. When so positioned, the bail 176 prevents sufficient rocking of the interponents 153 for actuating the hammer latches 152 as above described. This is best illustrated in FIG. 7, wherein such bail 176 is illustrated as operably associated with the usual printer mechanism. Referring thereto, it is seen that each interponent 153, when released for rocking by its type bar 130, is permitted a slight rocr ing movement only before contacting and being stopped by the bail 176. This movement, the extent of which is herein illustrated by the dash-line position of the interponent as stopped by the bail, is less than that required for engaging the lower step and actuating the trip latch 152 as above described.

Thus, in the normal, spring-urged position of the bail 176, as seen in FIGS. 7 and 7A, the printing operation is effectively prevented during each machine cycle. On the other hand, and in accordance with such mechanism disclosed herein, the printing operation may be performed by overcoming such normal positioning provided by the tension of the spring 179. In this regard, it is apparent that, as the bail 161 is rocked clockwise about its pivot shaft 165, the bell crank 166 will be thereby rocked counter-clockwise about its pivot shaft 169, and, through the shifting of the link 1711 thereby, the print control arm 172 will be rocked clockwise about its pivot shaft 175. Upon this happening, the print control bail 17 6 will likewise be rocked clockwise about its pivot shaft 180, being thereby removed from its normal blocking position and permitting the interponent 153 to rock the distance required for tripping the hammer latch 152 when it is shifted forwardly, as above described, during the machine cycle. As above mentioned with reference to the second arm member 163 of the bail 161, specific means for rocking the bail 161 and causing a printing oepration to be performed will be described later herein.

Referring further to FIG. 7, it is seen that the record feed mechanism of the instant invention is substantially the same as that disclosed in the above-mentioned United States Letters Patent to Nelson R. Frieberg and Oscar F. Larsen No. 2,813,611. Pivoted to the paper carriage left side plate 182 is an arm supporting the left end of a vertical feed bail 185. The right end of the feed bail 185 is supported by a second arm, like the arm 183 illustrated herein by dash lines, pivoted to the paper carriage right side plate. The feed bail 185 is biased to swing clockwise about its pivots by a spring 186 wound around the pivot of the second arm 183 and hooked over the bail. Pivoted to a centrally-disposed frame-supported member 1817, by means of a pin 188-, is a yoke 189, supporting a roller 19% and having a forwardlyand upwardly extending arm portion 191. The outermost end of the arm portion 191 rests against the stud 159 of the cam 158 secured to the machine rear drive shaft 51.

When the machine is at home, the roller 190, which constantly bears on the forward edge of the feed bail 185, keeps the feed bail rocked to its counter-clockwise position. As the machine operates, the rear drive shaft 51 moves the cam 153 and its stud 159 away from the arm portion 191, thereby enabling the bail 185 to rock clockwise unless otherwise prevented. As also seen in FIG. 7, the upper end portion of the arm 183 has pivoted thereto, at 193, a record feed pawl 192, which is held rocked by a spring 194 to normally abut a stud 195. A forward toothed end of the feed pawl 192', when the machine is at rest, or home, nearly engages a ratchet wheel (not shown herein) secured to the right end of the platen support shaft 24a. Therefore, as the machine commences operation and the feed bail 185 moves toward the machine rear drive shaft 51, the feed pawl 192 is drawn rearwardly, and, on the last half of the machine cycle, such pawl 192 moves forwardly to contact a tooth on the ratchet wheel and move it, along with the platen 24, coupled thereto, in a vertical record-feeding direction.

In the preferred embodiment of the present invention, normally there is positioned in front of the yoke arm member 191 an arm 196 for blocking the feeding movement of the vertical feed bail 185, such arm 196 being illustrated in FIG. 8 as extending upwardly from a pivot bolt 197 secured to a plate member 198, which extends across the lower rear end of the machine. A link 199, by means of pivot studs 209 and 201, operably connects the arm 196 to a bell crank 2112, which, by means of a bolt 295, is rockably mounted adjacent the right end of the machine plate member 198. In view of such construction, if the bell crank 202 is rocked counter-clockwise about its pivot bolt 205, the arm 196 is rocked clocktively rocking the bell crank 2112 during multi-cycle machine operations. 7

Machine Cycle Control Mechanism Referring again to FIG. 2, upon machine cycling being initiated by the rearward shifting of continuous cycle ,control lever 31, thereby closing the switch 94 and enmay be termed a non-add cycle for conditioning the machine mechanism for a totalizer reading operation; and the third cycle may be termed a sub-total cycle for reading and printing the amount contained in the totalizer mechanism. Of course, the first and third cycles, above referred to as being preferably add and sub-total cycles, may conveniently be changed, respectively, to subtract and total cycles if so desired for a particular application of the machine. In any event, such three cycles constitute one machine operation, and, in view of the control knob 29 with its associated mechanism, as will be described shortly, a predetermined number of such three-cycle machine operations may be easily and accurately provided.

As the lever 31 is shifted rearwardly for closing the switch 94, a stud 206, carried by the lower end thereof, is shifted forwardly to a position behind an upper shoulder 209 of a switch latch 207. The latch 2137 is rockably carried, by means of a pivot stud 211, on the left vertical frame plate of the machine, having its major length 208, including the shoulder 209, extending rearwardly of the pivot stud 211, and its minor length 210 extending forwardly and upwardly therefrom. A spring 213 extends between the outermost end of the length 208 and the upper positioned frame stud 98 to yieldingly urge the latch 207 clockwise and in constant abutment with the stud 206. Thus, whenthe lever 31 is shifted rearwardly a distance sufficient to close the switch 94, its stud 206 will fall behind the shoulder 209 of the latch 207, thereby automatically retaining the lever 31 in its shifted position and maintaining the switch 94 in a closed condition. Such latching of the lever 31 is retained until the normal tension of the spring 213 is overcome and the latch 2117 is rocked counter-clockwise to remove the shoulder 209 from in front of the stud 206, at which time the spring 101 returns the lever 31 to its unoperated or forward position.

As mentioned earlier in the specification, the stop control key 33 provides one means for unlatching the lever 31 from its operated position. Such key includes a down- 7 wardly-extending stem portion 214 slidingly guided for approximately vertical movement by means of an upper, key-frame stud 119 slidingly engaging a slot 215 therein, and a lower, machine-frame plate stud 218 slidingly engaging a bifurcated end portion thereof. A spring 219, extending between a stud 216 of the stem 214 and the stud 119, yieldingly retains the stop control key 33 in an upper, unoperated, position, being overcome upon the depression of the key 33 and permitting a lower stud 217 thereof to move downwardly a distance determined by the slot 215 provided therein. This movement of the stud 217 is sufficient to enable it to contact and rock the latch 297 counter-clockwise an amount which permits the lever stud 206 to be released therefrom, whereupon the lever 31 is immediately returned to its unoperated wise about its pivot bolt 197, thereby being removed from position under the urge of the spring 1131. Also included in the present invention is a second means for unlatching the lever 31 from its operated position, being associated with and actuated by the cycle control mechanism as now described.

Referring to FIG. 2, a link 2211, extending between pivot studs 221 and 222, operably connects the continuous Cycle control lever 31 with a forwardly-positioned arm 223. This arm 223 is secured to a shaft 224, herein shown as being secured to the outermost end thereof and on the outer side of the machine left frame plate 40. As best seen in FIG. 5, the shaft 224 extends inwardly from the plate 40 to terminate at approximately the center of the machine, being journaled between such plate 40* and an ear 74a turned upwardly from a machine forward base plate 74. A second arm 225 is secured to the shaft 224, adjacent the base plate ear 74a, and, by means of a link 226, as best seen in FIG. 9, extending between pivot studs 227 and 228, the shaft 224 is operably interconnected with an arm 229, which, in turn, is secured to a rearwardlyand upwardly-positioned rock shaft 230. As seen in FIG. 5, the rock shaft 230 is journaled between a pair of spaced-apart, upstanding brackets 231 and 232 fixedly carried by the base plate 74. A second arm 233 is also secured to the rock shaft 230, herein shown as being spaced a distance from the arm 229 to position an upper stud 234 thereof immediately below and normally in the path of travel of a cam shaft drive pawl 235 (FIG. The drive pawl 235, as best seen in FIGS. 4 and 5, extends forwardly from an arm 240 secured to the machine main shaft 108, being pivotally connected thereto by a stud 236, so that, as the shaft 198 is oscillated during each machine cycle, the pawl 235 is thereby shifted first fonwardly and then returned rearwardly, back to home.

Referring further to FIG. 5, a cam shaft 242 is likewise journaled between the brackets 231 and 232, being located approximately centrally of the horizontal distance between the shafts 224 and 230 and slightly upwardly of the shaft 239 (FIG. 4). Fixed to the cam shaft 242, adjacent its right end, is a drive member 243, which, when permitted to be actuated by the drive pawl 235, aligned therewith and positioned thereabove as seen in FIG. 5, causes the cam shaft 242 to be rocked clockwise (FIG. 4) a predetermined distance during each machine cycle. This rocking of the cam shaft 242 is best understood by looking to FIG. 9, wherein the various members secured to the cam shaft 242 are illustrated in sideby-side relationship, and in their respective home positions, as viewed from the right of the machine.

Referring to FIG. 9, and also to FIGS. and 10A for detail reference numerals not included in FIG. 9 for the sake of clarity, the illustrated drive member 243 comprises a pair of spaced-apart side plates 244 and 245, firmly secured one to another by means of three intervening studs 246, 247, and 248. These three studs, hereinafter referred to as indexing studs, are equally spaced, one from another, around the peripheries of the plates 244 and 245. As also seen in FIG. 9, the drivepawl 235 is provided with a forward end portion 237, having a lower, cam-like surface terminating in a downwardlydirected shoulder 238. By means of a spring 241, stretched between the pawl 235 and the base plate 74, the pawl 235 is yieldingly urged counter-clockwise (FIG. 4) to present its forward end portion 237 normally in operable association with the drive member 243. In this instance, and when the machine is at rest, the pawl end portion 237 is located immediately behind one of the indexing studs, such as the stud 247, with its shoulder 238 abutting the next stud therebehind, such as the stud 246, as seen in FIG. 9, where the cam shaft 242 is illustrated in its unrocked, or home, position. As further seen in FIG. 9, a downwardly-extending cam surface 239 is provided on the pawl 235, being located behind the rock shaft stud 234 when the machine is at home and shifted substantially therepast during each machine cycle.

In considering the cycle control mechanism thus far described, it is seen that, when a machine operation is initiated by means of the continuous cycle control lever 31, the cam shaft 242 is effectively rocked one third of a revolution (120 degrees) during each machine cycle thereof. Referring to FIG. 2, when the lever 31 is shifted rearwardly, as above described, the forward shaft 224 is thereby caused to be rocked clockwise (FIG. 2) and counter-clockwise (FIG. 9), which shaft 224, in turn, causes the rock shaft 236 to be rocked clockwise (FIG. 9) for removing the stud 234 from the path of travel of the cam line drive pawl 235. As best seen in FIG. 10A, such stud 234 is rocked downwardly and away from the drive pawl cam surface 239, enabling the drive pawl forward end portion 237 to engage the next forward indexing stud, when the pawl 235 is shifted forwardly during the first half of the machine cycle, and rock that stud, along with the shaft 242, clockwise, as the pawl 235 is returned home during the last half of the machine cycle. In accordance with the specific illustrations of FIGS. 9 and 10A, during the forward shifting of the drive pawl 235, its forward end portion 237 is cammed over the indexing stud 247, enabling the shoulder 238 to be yieldingly urged therebehind. Then, upon the return shifting of the pawl 235, such shoulder 238 carries with it the stud 247 and positions it at the zone formerly held by the stud 246. Such movement of the stud 247 causes the cam shaft 242 to be indexed degrees. 'In view of the latching of the control lever 31, as above described, this cam-shaft-indexing operation is continued during each machine cycle provided in the overall machine operation as initiated by the lever 31.

Contrary to this operation, when a machine cycle is initiated by some means other than the lever 31, as by the add control key 26 provided in the instant invention, the cam shaft 242 remains stationary; that is, his not rocked by the drive pawl 235 as described above. In this instance, the rock'shaft stud 234 would remain positioned, as seen in FIGS. 9 and 10, in the path of travel of the drive pawl cam surface 239. 'With such positioning of the stud 234, as the drive pawl 235 is shifted forwardly during the first half of the machine cycle, its under surface 239* soon contacts such stud 234, thereby camming the pawl also upwardly (FIG. 10) and preventing its forward end portion 237 from engaging the stud 247. Then, upon the return shifting of the pawl 235, its forward end portion 237 again assumes its normal, home position, adjacent the stud 246 (FIG. 9). As seen in FIGS. 5 and 9, a roller 249, on the machine shaft 129, cooperates with an upper cam surface 256 of the drive pawl 235, assuring a true home positioning of such pawl when the machine is at rest. The shaft 129, as seen in FIG. 5, is journaled between the machine left frame plate 49 and the base plate carried bracket 231, being located (FIG. 4) rearwardly and upwardly from the rock shaft 230.

Secured to the cam shaft 242, adjacent the drive plate 243, is a drum cam 251. This cam, as best seen in FIG. 5, is provided with the usual raceway, herein receiving contin uously the above-mentioned roller stud 1370f the control arm 136 and providing the means for periodically rocking the arm 136 first clockwise, for shifting the stop bars 122 from'under their respective rows of keys 25, and then counter-clockwise, for returning the shifted stop bars back to their home positions, underlying such rows of keys 25. As will be described later with reference to the machine operation, such cam and control arm arrangement causes the stop bars 122 to be shifted away from the keys 25 near the end of the second, or non-add, cycle of each machine operation, there being three cycles within each operation as above described, and likewise causes such stopbars to be returned immediately under the keys 25 near-the end of the third, or sub-total, cycle of each operation. With such arrangement, it is seen that the stop bars 122 are positioned under their respective rows of keys 25 during the first, or add, cycle of the machine operation, thereby entering the set-up amount into the machine totalizer mechanism during such cycle.

Adjacent the cam 251, and to its left, the cam shaft 242 carries three plate cams 252, 253, and 254, each of which is spaced (FIG. one from the other along the shaft 242, and each of which is equally spaced (FIG. 9) one from the other around the periphery of the cam shaft 242. Thus, like the indexing studs 246, 247, and 248, these cams 252, 253, and 254 are positioned for operation at 120-degree intervals. A bracket 255, secured to the base plate 74 and at a zone rearward of the cam shaft 242, fixedly carries three spaced-apart switches 103a, 203a, and 303a, aligned with and extending, respectively, under the plate cams 254, 253, and 252. As best seen in FIG. 9, the switch 103a is normally closed by thepositioning of the cam 254 when the machine is at home; that is, prior to initiation of machine operation by the continuous cycle control lever 31. As described earlier, such switch 103a is included in the energizing circuit of the trip solenoid 103 (FIG. 13), thereby enabling the first machine cycle, which is the add cycle, of each machine operation to be initiated when the lever 31 is shifted rearwardly (FIG. 2). During the second half of such add cycle, the cam shaft 242 is rocked, as above described, 120 degrees clockwise (FIG. 9). In view of such rocking of the cam shaft 242, the switch 1031: becomes opened as the cam 254 moves upwardly and away therefrom, thus preventing the next machine cycle from being initiated by the trip solenoid 103. At the sarne'time, the cam 253 is moved downwardly to contact and close the switch 203a, this happening near the end of the machine cycle. Of course, the remaining cam 25-2 is also rocked along with the cam shaft M2, being moved to the position formerly held by the cam 253.

Referring to FIG. 13, upon the closing of the switch 203a, a circuit is completed for energizing a solenoid 203, which, through mechanism effected thereby, causes a nonadd cycle of the machine to be initiated. As seen in FIG. 5, such solenoid 203 is herein illustrated as being secured to the base plate 74, at a zone approximately central of the machine, and having its forwardly-extending core member 204 operably interconnect, by means of a downwardly-extending link 265, a control lever 266 rockably mounted on the base plate 74. A spring 268, extending between the lever 266 and the machine rear base plate 73, normally urges the control lever 266 counter-clockwise about its pivot bolt 269 a distance determined by a base plate stop stud 270. When so positioned, which is the case until the solenoid 203 becomes energized, an outer cam portion 267 of the lever 266 (FIGS. 4 and 5) is located substantially behind an inwardly-directed stud 272 of the usual latch plate 271 rotatable about the machine right vertical frame plate stud 273.

Although the general construction of the calculating machine type of operation control mechanism embodied in the present invention is admirably described in United States Letters Patent to Harry L. Lambert No. 2,654,537, in order to assure a thorough understanding of the present machine cycle initiated by the solenoid 203, which is the second, or non-add, cycle of the machine operation initiated initially by the lever 31, pertinent mechanism thereof will likewise be described herein. Referring to FIG. 3, pivotally mounted on the main trip lever 82 is a bell crank 275, which has an upwardly-extending arm 276, normally urged into engagement with the upwardlyextending arm of the lever 82 by a spring 277. Thus, under normal operating conditions, the rearwardly-extending arm of the bell crank 275 operates as a rearward arm of the trip lever 82 and can therefore be actuated to rock the trip lever 82 clockwise. A stud 278 on the bell crank 275 can be engaged by a forward extension 280 (FIGS. 3 and 4) of the usual non-add and total lever latch 279, pivoted on a stud 282, which extends from the right plate 118 of the keyboard to depress the free end of the rearWardly-extending arm of the bell crank 275 and rock the trip lever 82 clockwise to initiate a machine cycle. This rocking of the trip lever 82, as above described, causes the link 278 to be shifted forwardly, in turn, rocking the trip lever 75 counter-clockwise to remove the trip 20 latch 49 from under the ear 42 of the three-armed lever 41.

Referring to FIG. 4, a non-add lever 283 is rockably mounted on the machine cross rod 143 and has pivoted thereto the upper end of a non-add link 284, the lower end of which is pivoted to the above-mentioned latch plate 271. A spring 285, extending from the link 2.84 and engaging a lower frame plate stud, normally urges the latch plate 271 counter-clockwise about its pivot 273, thereby presenting a latch-retaining plate 286', operably associated with the latch plate 271, in blocking relation with a rearwardly-extending flange 281 of the non-add and total lever latch 279. As seen in FIGS. 3 and 4, a spring 287 yieldingly urges the non-add and totallever latch 279 counterclockwise about its pivot 282.

With such construction, upon the energization of the solenoid 203, the control lever 266 is thereby rocked clockwise about its pivot bolt 269 (FIG. 5), in turn, and by means of its outer cam portion 267, rocking the latch plate 271 clockwise about its pivot 273 (FIG. 4). As such latch plate 271 is rocked, its associated latch-retaining plate 286 is removed from blocking relation with the flange 281, thereby allowing the non-add and total lever latch 279 to be moved to a latching position under urgence of the spring 287. As the latch 279 is thus moved, its forward arm 280 initiates a cycle of operation of the machine as explained earlier herein. Simultaneously therewith, the latch plate 271 shifts the non-add link 284 upwardly to condition the machine for a non-add operation in the manner fully explained in the United States patent to Heber C. Peters No. 1,386,021. Again, during such machine cycle, the cam shaft 242 is rocked (FIG. 9) an additional 120 degrees. During such rocking of the cam shaft 242-, its drum cam 251 is likewise rocked, causing the control arm 136 to be rocked clockwise (FIG. 5), in turn, and through the control link 141, shifting the stop bars 122 from their normal alignment with the digit keys 25. Also, during such rocking of the cam shaft 242, its plate cam 253 moves away from the closed witch 203a, permitting it to open, while its'plate cam 252 moves downwardly to contact and close the switch 303a. Its remainingcam, 254, is rocked to the position formerly held by the cam 252; that is, in the position for closing its switch 103a near the end of the next rocking movement of the cam shaft 242. In view of the immediate opening of the switch 92, at the very beginning of such non-add machine cycle, the circuit to the solenoid 203 is broken, and the control lever 266 is permitted to be returned to its normal position under urgence of the spring 268. As best seen in FIG. 4, the non-add and total lever latch 279 retains the parts associated therewith in their moved positions until the usual roller 288 (FIG. 3) on the full-stroke sector 107 engages a by-pass pawl 289 on the latch 279 soon after the beginning of the return strokeof the sector 107, and rocks the latch 279 clockwise to move its flange 281 from latching relation with the latch-retaining plate 286, thereby releasing the trip lever 82 and allowing the spring 285 to return the non-add link 284 and parts affected thereby to their normal positions.

As seen in FIG. 13, upon the closing of the switch 303d, a circuit is now completed for energizing a solenoid 303,v which, through mechanism actuated thereby, causes a subtotal cycle of the machine to be initiated. Referring to FIG. 5, such solenoid 303 is herein illustrated as being also secured to the base plate 74, adjacent the non-add solenoid 203, and having its rearwardly-extending core member 304 pivotally connected to an arm 306 secured to a sub-total trip shaft 305. This shaft 305 is journaled between the machine right frame plate and an upstanding bracket 307 secured to the rear base plate 73. As seen in FIG. 3, a second arm 308 is secured to the shaft 305, on the outer side of the frame plate 80, and, by means of a link 309, extending between pivot studs 310 and 311, the shaft 305 is operably interconnected with a sub-total latch arm 312, rotatable about an upper, right vertical frame plate bolt' 313. A spring 314, stretched between the latch arm 312 and the shaft 169, yieldingly urges the latch arm 312 counterclockwise to normally present an upper shoulder 315 thereof immediately behind a stud 317 carried by a sub-total trip arm 316, rockably mounted on a frame plate stud 319. An upper end portion 318 of the trip arm 316 is provided with gear teeth in constant mesh with like gear teeth provided on an arm 320 secured to the shaft 165. By means of a strong spring 321, extending between the arm 320 and a forward frame plate stud 322, the shaft 165 is cocked for a clockwise movement, being restrained from such movement in view of the normal latching of the trip arm 316 by the latch arm 312. In accordance with such construction, upon the energization of the sub-total solenoid, as above described, the latch arm 312 is rocked clockwise as the trip shaft 305 is rocked counter-clockwise, thereby removing the shoulder 315 of such latch arm 312 from behind the stud 317 and permitting the shaft 165 to be immediately rocked clockwise under the urge of the spring 321. In view of such gear teeth arrangement between the trip arm 316 and the shaft arm 320, the trip arm 316 is caused to be rocked counterclockwise about its pivot 3-19 and present its lower end portion adjacent a stud 323, extending outwardly from the machine drive link 106.

As seen in FIG. 4, a trip finger 324 is secured to the shaft 165, being positioned adjacent the machine right frame plate 80 and in alignment with an inwardly-directed stud 325 carried by an arm 326 secured to the total lever 28. As also seen in FIG. 4, the stud 325 is in alignment with the above-described right arm portion 163 of the bail 161, rockably mounted on the shaft 165. As best seen in FIG. 3, a second stud 327, extending outwardly from the total lever 28, is operably associated with an upper cam arm 329 of a record feed lever 328 rockably mounted on the outer side of the machine right frame plate 80 by means of a bolt 330. A turned-over end portion 331 of a rearwardly-extending major leg of the lever 328 is operably interconnected, by means of a link 333 extending between pivot studs 334 and 335, with the above-mentioned bellcrank 202 (FIG. 8). A spring 336, extending between the lever 328 and an upper frame stud 337, normally urges such record feed lever 328 counterclockwise for presenting the record feed blocking arm 196 (FIGS. 7 and 8) in the path of travel of the yoke 189.

With this construction, it is apparent that, upon the energization of the solenoid 303 and the resultant clockwise rocking of the shaft 165 thereby, the trip finger 324 will cause the total lever 28 to be rocked counter-clockwise about its pivot 169. This rocking of the lever 28, as set out in United States Letters Patent No. 1,854,875, to Nelson White, conditionsthe machine mechanism in the usual manner for causing a sub-total operation to be performed. As seen in FIGS. 4 and 7, such rocking of the lever 28, by means of the aligned stud 325 and bail arm 163, also causes the bail 161 to be rocked clockwise, thereby rocking the print control bail 176 from under the interponents 153 and enabling the printing operation to be performed during such sub-total machine operation. In addition, the lever stud 327 causes the record feed lever 328 to be rocked clockwise an amount sufficient to remove its associated blocking arm 196 from in front of the yoke 189', thereby enabling the record material to be spaced in the usual manner near the end of the machine cycle. Thus, such r'ockin'g'of the total lever 28' conditions the machine mechanism for a-sub-total operation to be performed when the machine is cycled, enables the amount accumulated in the totalizer mechanism to be printed on the record material during such sub-total operation, and enable the record material to be spaced at the end of such sub-total machineoperation. In additiomthe initial rocking of the total lever 28 causes the machine cycle to be initiatedthat is, causes the trip latch 49 (FIG. 12) to be rocked from under theear 42 of the three-armed lever 41 as above described.

Although the precise structure for actually tripping the machine for this third or sub-total machine cycle is also substantially like that disclosed in United States Letters Patent No. 2,654,537, which issued to Harry L. Lambert and to which reference may be had, a somewhat ditferent mode of operation thereof is incorporated in the present invention. Therefore, an added description of the pertinent tripping mechanism is included herein to assure a thorough understanding of such mechanism as embodied in the instant invention.

Referring to FIG. 4, as the total lever 28 is rocked counterclockwise, the upper end of a link 340 is thereby shifted rearwardly and upwardly, causing the link 340 to move upwardly and rock the usual total control bell crank 341 counter-clockwise about its pivot 342 and against the action of a spring 343. When such bell crank 341 is rocked, it pulls a link 344 rearwardly. This link 344 is pivotally connected at its forward end to an arm 345, which is rockably mounted on a stud 346 provided on the inside of the machine right frame plate 80. When such link 344 is pulled rearwardly, a stud 347 thereon, cooperating with the bifurcated lower end portion of a bell crank 348, causes the bell crank 348 to rock about the abovementioned pivot stud 273. As the bell crank 348 is so rocked, a forwardly-extending finger thereof is moved from above to below the flange 281 of the non-add and total lever latch 279. This movement of the bell crank 348 will also cause a stud thereon (illustrated in FIG. 4 but not designated by a specific reference numeral) to engage the latch-retaining plate 236 and rock that plate also about the stud 273 to remove its finger portion from blocking relation with the flange 281, thereby allowing the spring 287 to rock the latch 279 counter-clockwise about its pivot 282. The latch 279, when thus rocked, moves the flange 281 over the finger of the bell crank 348, thereby retaining the bell crank 348 and the total lever 28 in their moved positions. Also, in the movement of the non-add and total lever latch 279 to its latched position, its forward extension 28%) engages the stud 278 and rocks the machine main trip lever 82 (FIG. 3) clockwise, thus initiating a cycle of operation of the machine in the manner explained earlier herein in relation to the second or non-add machine cycle included in the machine operation. At the very beginning of such sub-total cycle, the switch 92 is again opened to deenergize the solenoid 303. Upon this happening, the spring 314 attempts to return the shaft 305 and its associated members to their normal positions, being restrained from so doing in view of the upper, rear surface of the latch 312 now abutting the stud 317 as shifted by the spring 321.

As above described, the usual full-stroke sector 187 is oscillated forwardly and then rearwardly during each machine cycle. Soon after the beginning of the forward stroke of the sector 187, the stud 323 on the link 106 engages the lower end of the trip arm 316 and rocks that arm clockwise a distance sufiicient to enable the spring 314 to rock the arm 312 counter-clockwise (FIG. 3) for again latching the arm 316 in its normal positionthat is, with the stud 317 located behind the shoulder 315, as illustrated in FIG. 3. This rocking and latching of the arm 316 again cocks the shaft as the spring 321 is tensioned, thereby returning the trip finger 324 (FIG. 4) back to its normal position. Again, the non-add and total lever latch 279 retains the parts associated therewith in their moved positions until the roller 288 (FIG. 3) engages the by-pass pawl 289, soon after the beginning of the return stroke of the sector 107, and rocks the latch 279 clockwise (FIG. 4) to move its flange 281 out of latching relation with the bell crank 348, thereby allowing the spring 343 to return the total lever 28 and parts connected thereto to their normal positions. Upon such return to home or normal position of the lever 28, the bail 161, with its associated mechanism, is returned to its normal, print-blocking position under urge of the spring 164 (FIG. 7). Simultaneously therewith, the record feed lever 328, with its asso- 23 ciated mechanism,- is returned to its normal, record-feedblocking position under urge of the spring 336 (FIG. 3). Also, during the second half of such sub-total machine cycle, the cam shaft 242 is again rocked 120 degrees by the drive pawl 235. This rocking of the cam shaft 242, along with prior rocking movements thereof during the above-mentioned add and non-add machine cycles, presents a complete revolution thereof, whereupon, as illustrated in FIG. 9, the switch 163a is again returned to its normally closed condition, while the switches 263a and 303a are maintained in open conditions.

In order to assure an accurate and positive positioning of the cam shaft 242 in this instance-that is, after it has been rocked 120 degrees by the drive pawl 235 during the above-described sub-total machine cycle-as well as after the first and second machine cycles of the machine operation, during each of which it is likewise rocked by the drive pawl 235, an aligning mechanism is included in the basic structure of the cycle control mechanism of the instant invention. As seen in FIG. 5, a detent wheel 25-6, herein illustrated as being positioned adjacent the left end of the cam shaft 242 and on the outer side of the base plate bracket 232, is secured to the cam shaft 242. This wheel 256, as seen in FIG. 9, is provided with three peripheral notches, like the notch 257, equally spaced one from another and in radial alignment with both the switchactuating plate cams 252, 253, and 254 and the cam-shaftindexing studs 246, 247, and 248. Operably associated with such wheel 256 is a horizontally-disposed stud 291, carried by a forwardly and upwardly extending arm of a detent lever 290, which, as best seen in FIG. 9, is rockably mounted on the rock shaft 230. By means of a spring 292, stretched between the lever 290 and a rearwardly positioned base plate stud 293, the lever 290 is yieldingly urged counter-clockwise to present its stud 291 in constant abutment with the periphery of the detent wheel 256, thereby assuring the desired positioning of the cam shaft 242 in each instance as a detent wheel notch 257 becomes aligned with and receives therein the stud 291.

Although the cycle control structure thus far described has been related to a single, three-cycle machine operation as initiated by the continuous cycle control lever 31, being done so herein for the sake of clarity, mechanism is associated with the above-mentioned control knob 29 permitting a selected number of such multiple-cycle machine operations to be performed, one after another, with the machine automatically coming to rest after the last cycle of the last machine operation has been completed. Referring to FIGS. 5 and 9, a single gear tooth 258 is secured to the detent wheel 2%, being spaced at distance to the left thereof and extending radially outwardly from the outermost end of the cam shaft 242. This tooth 258, as best seen in FIG. 9, is operably associated with a large gear 295, rotatably carried by the rock shaft 230. A small gear 296, secured to the gear 295 and spaced a distance to the left thereof, is maintained in constant mesh with a third gear 261, secured to the innermost end of a short shaft 260, rotatably carried by the machine left vertical frame plate 40. This shaft 2641, hereinafter referred to as a control shaft, is axially aligned with the cam shaft 242 and is selectively rotated by means of the control knob 29, which, as seen in FIG. 5, is secured to the outermost end thereof. Adjacent the inner surface of the machine frame plate 40, at a spaced distance to the left of the gear 261, the control shaft 260 is provided with a fixed cam 262, having an outwardly-extending abutment or protuberance 263, radially aligned with the position as indicated on the control knob 29. Also aligned with the 0 position on the control knob 29 is a latch release stud 212 (FIGS. 2 and 5) extending inwardly from the minor length 210 of the switch latch 207 and lying normally in the path of travel of the cam abutment 263. As seen in FIG. 11, an

aligning pawl 298 is yieldingly urged counter-clockwise,

24 tion with the gear 295, rotatably carried by the rock shaft 230.

' In accordance with such construction, the control knob 29 may be manually set for causing a selected number of the above-described three cycle machine operations to be performed. Upon the setting of such knob 29 to the desired ntnnber of operations, from one to sixty as indicated thereon, the cam 262 is likewise set in accordance there with. This setting of the cam 262, as best seen in FIG. 11, removes its abutment 263 from its normal alignment with the release stud 212 and positions it a distance therefrom corresponding to the movement of the control knob 29. As described earlier in the specification, when the machine is operated by the rearward shifting of the lever 31, such lever 31 becomes latched in its shifted position as the switch latch shoulder 209 falls behind the lower stud 206 thereof. Upon such latching of the lever 31, the switch 94 is retained in a closed condition to enable, as above described, the add, the non-add, and the sub-total machine cycles to be performed, one after another. Near the end of such sub-total cycle, the gear tooth 258, which has been rocked 360 degrees along with the cam shaft 242, contacts and rocks the large gear 295 a distance equal to approximately one tooth thereof. Upon such rocking of the gear 295, its associated gear 296 likewise rocks the gear 261 to index the control knob 29 that distance toward its home, or 0 position. Such indexing of the control knob 29 is best seen in FIG. 2, where the cam abutment 263 is thereby rocked counter-clockwise the onetooth distance toward the latch release stud 212. This operation is continued until the control knob 29 is indexed back to its 0 position, at which time the cam abutment 263 contacts the release stud 212 and rocks the switch latch 297 counter-clockwise about its pivot 211 a distance sufiicient to release the lever 31, which may then be returned to its unoperated position under urge of the spring Upon this happening, the switch 94 is permitted to open and prevent a further machine operation from being initiated.

Machine Operation In view of the fact that a somewhat detailed mode of operation is included with the specific description of the various mechanisms employed in the instant invention, the following discussion is included herein as a general, overall summary of the machine operation. In essence, and without going into any great extent of detail, it may be stated generally that the present invention enables an item amount to be repeatedly entered into a calculating machine totalizer mechanism with intervening totalizer reading and printing operations being performed, all without affecting, in any manner, the item amount as initially set up on the machine keyboard.

To effectively illustrate the general operation of such a machine, it is herein assumed, as an example of a typical machine operation, that an amount of is initially set up on the digit keys 25 (FIG. 1) and the control knob 29 is manually rocked from its 0 position and set to its number 4 position. The continuous cycle control lever 31 may then be actuated for closing the switch 94, which, along with the current supply line switch 92, which is closed when the machine is at home, completes the necessary circuits for initiating one machine cycle after another until the overall operation is completed.

Referring to FIG. 13, upon the closing of the switch 94, a circuit is immediately completed through the normally closed cam shaft switch 10311 for energizing the add sole-, noid 103. This solenoid 103, when energized, causes the first cycle of the first machine operation to be initiated, which is an add machine cycle wherein the illustrative amount of 125 is added into the totalizer mechanism of the machine. During such cycle, the machine -stop bars 122 are stopped, in the usual manner, by the 

